/*
 * Copyright (c) 2016—2017 Andrei Tomashpolskiy and individual contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package bt.torrent.messaging;

import bt.protocol.Cancel;
import bt.protocol.Choke;
import bt.protocol.Interested;
import bt.protocol.KeepAlive;
import bt.protocol.NotInterested;
import bt.protocol.Unchoke;
import bt.torrent.annotation.Consumes;

/**
 * Consumer that is responsible for processing
 * some of the very basic messages.
 *
 * @since 1.0
 */
public class GenericConsumer {

    private static final GenericConsumer instance = new GenericConsumer();

    public static GenericConsumer consumer() {
        return instance;
    }

    @Consumes
    public void consume(KeepAlive keepAlive) {
        // ignore
    }

    @Consumes
    public void consume(Choke choke, MessageContext context) {
        context.getConnectionState().setPeerChoking(true);
    }

    @Consumes
    public void consume(Unchoke unchoke, MessageContext context) {
        context.getConnectionState().setPeerChoking(false);
    }

    @Consumes
    public void consume(Interested interested, MessageContext context) {
        context.getConnectionState().setPeerInterested(true);
    }

    @Consumes
    public void consume(NotInterested notInterested, MessageContext context) {
        context.getConnectionState().setPeerInterested(false);
    }

    @Consumes
    public void consume(Cancel cancel, MessageContext context) {
        context.getConnectionState().onCancel(cancel);
    }
}
